Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays
RAR. AaijBAB. AdevaMAM. AdinolfiZAZ. AjaltouniSAS. Akar
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Abstract
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B 0 K * 0 + -and B 0 K * 0 e + e -decays, R K * 0 , is presented. The K * 0 meson is reconstructed in the final state K + -, which is required to have an invariant mass within 100 MeV/c 2 of the known K * (892) 0 mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of about 3 fb -1 , collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ratio is measured in two regions of the dilepton invariant mass squared, q 2 , to be R K * 0 = 0.66 + 0.11 -0.07 (stat) 0.03 (syst) for 0.045
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Authors
789- RAR. AaijCorresponding
- BAB. Adeva
- MAM. Adinolfi
- ZAZ. Ajaltouni
- SAS. Akar
Topics & keywords
Topics
Keywords
- Lepton
- Branching fraction
- Invariant mass
- Universality (dynamical systems)
- Meson
- Invariant (physics)
- Luminosity
- B meson
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Funding
- NSNational Science FoundationAward: CNRS/IN2P3
- AVAlexander von Humboldt-Stiftung
- CCERN
- INInstitutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei'
- LTLeverhulme Trust
- RSRoyal Society
- RCRoyal Commission for the Exhibition of 1851
- ECEuropean Commission
- DFDeutsche Forschungsgemeinschaft
- SNSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- NNNational Natural Science Foundation of ChinaAward: IN2P3
- RFRussian Foundation for Basic Research
- CDCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
- BFBundesministerium für Bildung und Forschung
- NONederlandse Organisatie voor Wetenschappelijk Onderzoek
- GVGeneralitat Valenciana
- CNConselho Nacional de Desenvolvimento Científico e Tecnológico
- MMax-Planck-Gesellschaft
- MEMinisterstwo Edukacji i Nauki
- FCFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- NANational Academy of Sciences of Ukraine
- CNCentre National de la Recherche ScientifiqueAward: CNRS/IN2P3
- FDFinanciadora de Estudos e Projetos
- SAScience and Technology Facilities CouncilAwards: 1681016, 1707993, ST/N000234/1, LHCb, ST/N000331/1, ST/N000250/1, 1708182, IN2P3, LHCb Upgrades, ST/G005974/1, ST/J004332/1, GRIDPP, ST/H006737/1, ST/K003410/1, ST/N000447/1, 1641747
- DEDeutsches Elektronen-Synchrotron
- INInstitut National de Physique Nucléaire et de Physique des ParticulesAward: CNRS/IN2P3